class_docstr: Interface for implementing a Trial Scheduler class.
  
  Note to Tune developers: If a new scheduler is added, please update
  `air/_internal/usage.py`.
docstr: Restore trial scheduler from checkpoint.
docstr_tok: ["Restore","trial","scheduler","from","checkpoint","."]
code: def restore(self, checkpoint_path: str):
      """Restore trial scheduler from checkpoint."""
      raise NotImplementedError
  
imports: from typing import Dict, Optional, TYPE_CHECKING
  from ray.air._internal.usage import tag_scheduler
  from ray.tune.result import DEFAULT_METRIC
  from ray.tune.experiment import Trial
  from ray.util.annotations import DeveloperAPI, PublicAPI
label_desc: Use image node_id 13 for calling the TrialScheduler obj's underlying member method code with example usage: obj.restore(checkpoint_path) without return types